Influence of Boundary Conditions on the Accuracy of Pulsation Dampers Characteristics in Analytical Models

  • Urszula Warzyńska Wrocław University of Science and Technology, Faculty of Mechanical Engineering, Lukasiewicza 5, 50-371, Wrocław, Poland
  • Tomasz Siwulski Wrocław University of Science and Technology, Faculty of Mechanical Engineering, Lukasiewicza 5, 50-371, Wrocław, Poland
Keywords: reactive damper, pressure pulsation, long transmission line model, plane wave theory, piston compressor

Abstract

A pressure pulsation phenomenon in positive displacement machinery and resulting from that noise and vibration problems are well-known and still unsolved issues. The article concerns modeling pressure pulsation dampers used for fluid machinery, in particular in gas systems. The currently used mathematical models based on the plane wave theory are verified in the special laboratory conditions with no flow and no wave reflections at the system outlet. The use of a compressor as an excitation source significantly influences the characteristics of a damper installed in a system. In this study, a measurement of common type dampers transmission loss characteristics with the use of pressure transducers is proposed. The article discusses the influence of boundary conditions in analytical models based on the plane wave theory on the accuracy of dampers characteristics. Basing on the measurements results some improvements in the analytical model are proposed.

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Author Biographies

Urszula Warzyńska, Wrocław University of Science and Technology, Faculty of Mechanical Engineering, Lukasiewicza 5, 50-371, Wrocław, Poland

Urszula Warzyńska – assistant professor at the Faculty of Mechanical Engineering at Wrocław University of Science and Technology, received her Ph.D. degree in Mechanical Engineering in 2017. Main research interests include numerical modelling of fluid flow phenomena with thermal and wave effects. From the beginning of her professional career associated with the Faculty of Mechanical Engineering, combining research with participation in commercial projects conducted for business entities. Coauthor of two patent solutions. Author or coauthor of over 50 scientific works, including scientific articles, R&D work overviews, book chapters and conference papers. Since 2020 co-editor of conference proceedings of International Scientific and Technical Conference “Hydraulic and Pneumatic Drives and Controls” (NSHP) held cyclically in Poland. Board member of the Polish Association of Mechanical Engineers and Technicians (SIMP). Educator teaching courses for students at the Faculty of Mechanical Engineering.

Tomasz Siwulski, Wrocław University of Science and Technology, Faculty of Mechanical Engineering, Lukasiewicza 5, 50-371, Wrocław, Poland

Tomasz Siwulski – assistant professor at the Faculty of Mechanical Engineering at Wroclaw University of Science and Technology. Since the beginning of his professional career investigating a broad spectrum of problems relating to heavy engineering machinery. He has held the position of an independent design engineer in a large mining machinery production plant, and as an expert witness provided factual support to the judiciary for over 14 years. Head of several R&D projects conducted in collaboration with industry, resulting in the development and partial implementation of new technical solutions and 5 granted patents. Author and coauthor of over 60 scientific works, including scientific articles, R&D work overviews, book chapters and conference papers. Moreover, author of over 50 forensic analyses. Board member of the Polish Association of Mechanical Engineers and Technicians (SIMP) and member of the Polish Committee for Standardization, KT 160 for Hydraulic Drives and Controls. Educator developing and teaching several courses for students at the Faculty of Mechanical Engineering.

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Published
2021-02-06
Section
NSHP2020